Class CzechAnalyzer

Lucene.Net.Analysis.Analyzer for Czech language.

Supports an external list of stopwords (words that will not be indexed at all). A default set of stopwords is used unless an alternative list is specified.

You must specify the required Lucene.Net.Util.LuceneVersion compatibility when creating CzechAnalyzer:

  • As of 3.1, words are stemmed with CzechStemFilter
  • As of 2.9, StopFilter preserves position increments
  • As of 2.4, Tokens incorrectly identified as acronyms are corrected (see LUCENE-1068)

Inheritance
System.Object
Lucene.Net.Analysis.Analyzer
StopwordAnalyzerBase
CzechAnalyzer
Implements
System.IDisposable
Inherited Members
Lucene.Net.Analysis.Analyzer.Strategy
Lucene.Net.Analysis.Analyzer.Dispose()
Lucene.Net.Analysis.Analyzer.GLOBAL_REUSE_STRATEGY
Lucene.Net.Analysis.Analyzer.PER_FIELD_REUSE_STRATEGY
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Lucene.Net.Analysis.Cz
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
public sealed class CzechAnalyzer : StopwordAnalyzerBase, IDisposable

Constructors

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CzechAnalyzer(LuceneVersion)

Builds an analyzer with the default stop words (DefaultStopSet).

Declaration
public CzechAnalyzer(LuceneVersion matchVersion)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion

Lucene.Net.Util.LuceneVersion to match

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CzechAnalyzer(LuceneVersion, CharArraySet)

Builds an analyzer with the given stop words.

Declaration
public CzechAnalyzer(LuceneVersion matchVersion, CharArraySet stopwords)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion

Lucene.Net.Util.LuceneVersion to match

CharArraySet stopwords

a stopword set

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CzechAnalyzer(LuceneVersion, CharArraySet, CharArraySet)

Builds an analyzer with the given stop words and a set of work to be excluded from the CzechStemFilter.

Declaration
public CzechAnalyzer(LuceneVersion matchVersion, CharArraySet stopwords, CharArraySet stemExclusionTable)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion

Lucene.Net.Util.LuceneVersion to match

CharArraySet stopwords

a stopword set

CharArraySet stemExclusionTable

a stemming exclusion set

Fields

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DEFAULT_STOPWORD_FILE

File containing default Czech stopwords.

Declaration
public const string DEFAULT_STOPWORD_FILE = "stopwords.txt"
Field Value
Type Description
System.String

Properties

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DefaultStopSet

Returns a set of default Czech-stopwords

Declaration
public static CharArraySet DefaultStopSet { get; }
Property Value
Type Description
CharArraySet

a set of default Czech-stopwords

Methods

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CreateComponents(String, TextReader)

Creates Lucene.Net.Analysis.TokenStreamComponents used to tokenize all the text in the provided System.IO.TextReader.

Declaration
protected override TokenStreamComponents CreateComponents(string fieldName, TextReader reader)
Parameters
Type Name Description
System.String fieldName
System.IO.TextReader reader
Returns
Type Description
Lucene.Net.Analysis.TokenStreamComponents

Lucene.Net.Analysis.TokenStreamComponents built from a StandardTokenizer filtered with StandardFilter, LowerCaseFilter, StopFilter, and CzechStemFilter (only if version is >= LUCENE_31). If a version is >= LUCENE_31 and a stem exclusion set is provided via CzechAnalyzer(LuceneVersion, CharArraySet, CharArraySet) a SetKeywordMarkerFilter is added before CzechStemFilter.

Overrides

Implements

System.IDisposable